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Finding the Fourth Proportional to 330,432.72, 495,870.53 and 212,187.09

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Solution

The fourth proportional to 330,432.72, 495,870.53 and 212,187.09 is: 318,422.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,432.72 : 495,870.53 = 212,187.09 : x
  2. Step 2: Convert to fraction form
    330,432.72/495,870.53 = 212,187.09/x
  3. Step 3: Cross multiply
    330,432.72x = 495,870.53 × 212,187.09
  4. Step 4: Simplify right side
    330,432.72x = 105,217,325,576.04
  5. Step 5: Solve for x
    x = 105,217,325,576.04/330,432.72
  6. Step 6: Final answer
    x = 318,422.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.